/*
 * Copyright 2009 Red Hat, Inc.
 *
 * Red Hat licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package org.jboss.netty.channel.local;

import java.util.concurrent.ConcurrentMap;

import org.jboss.netty.channel.Channel;
import org.jboss.netty.util.internal.ConcurrentHashMap;

/**
 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
 * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
 */
final class LocalChannelRegistry {

    private static final ConcurrentMap<LocalAddress, Channel> map =
        new ConcurrentHashMap<LocalAddress, Channel>();

    static boolean isRegistered(LocalAddress address) {
        return map.containsKey(address);
    }

    static Channel getChannel(LocalAddress address) {
        return map.get(address);
    }

    static boolean register(LocalAddress address, Channel channel) {
        return map.putIfAbsent(address, channel) == null;
    }

    static boolean unregister(LocalAddress address) {
        return map.remove(address) != null;
    }

    private LocalChannelRegistry() {
        // Unused
    }
}
